Synchronous way to start a Process

Hi,Want to know if there is any mechanisms which I can use to invoke a process deployed in the Activiti engine ?So here is an use case for example say I have a deployed Activiti engine as an OSGI bundle in my container, and now I want to be able to use some mechanism which would expose Activiti Actions like Start Process:ProcessName and I am expecting this call to be a blocking call so that I know the out of the Action.